Electrolytic capacitor and method of making the same
AssigneeRohm Co., Ltd.
InventorsKentaro Naka, Takahiro Maeda
Life of this patent
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Abstract
A solid electrolytic capacitor includes a capacitor element, an external conduction member and a fuse conductor. The capacitor element includes a porous sintered body made of valve metal, an anode wire projecting from the porous sintered body, and a dielectric layer and a solid electrolyte layer covering the porous sintered body. The fuse conductor electrically connects the external conduction member and one of the anode wire and the solid electrolyte layer to each other. The fuse conductor is made of a metal containing one of Au—Su-based alloy, Zn—Al-based alloy, Sn—Ag—Cu-based alloy, Sn—Cu—Ni—based alloy and Sn—Sb—based alloy.
Claims29
A solid electrolytic capacitor comprising:
- a capacitor element including a porous sintered body made of valve metal, an anode wire projecting from the porous sintered body, a dielectric layer covering the porous sintered body, and a solid electrolyte layer;
- an external conduction member;
- and
- a fuse conductor electrically connecting the external conduction member and one of the anode wire and the solid electrolyte layer to each other;
- wherein the fuse conductor is made of a metal containing one of Au—Su-based alloy, Zn—Al-based alloy, Sn—Ag—Cu-based alloy, Sn—Cu—Ni-based alloy and Sn—Sb-based alloy.
The solid electrolytic capacitor according to claim wherein the thin plate portion includes a thin wall portion and a thick wall portion, and as viewed in a thickness direction of the thin plate portion, the thin wall portion overlaps the capacitor element, whereas the thick wall portion does not overlap the capacitor element.
A solid electrolytic capacitor comprising:
- a capacitor element including a porous sintered body made of valve metal, an anode wire projecting from the porous sintered body, and a dielectric layer and a solid electrolyte layer covering the porous sintered body;
- an external conduction member;
- a fuse conductor electrically connecting the external conduction member and one of the anode wire and the solid electrolyte layer to each other;
- and
- a board that includes:
- a plate-like insulating substrate;
- an anode pattern and an intermediate pattern both formed on an obverse surface of the insulating substrate, the intermediate pattern being spaced away from the anode pattern;
- an anode electrode pattern formed on a reverse surface of the insulating substrate;
- and an anode via hole connecting the intermediate pattern and the anode electrode pattern to each other;
- wherein the anode wire is hooded to the anode pattern, and the anode pattern and the intermediate pattern are connected to each other by the fuse conductor.
A method of making a solid electrolytic capacitor including a capacitor element including a porous sintered body made of valve metal, an anode wire project Log from the porous sintered body, and a dielectric layer and a solid electrolyte layer covering the porous sintered body, the method comprising the steps of:
- bonding a first end of a fuse conductor to an external conduction member by ball bonding;
- and
- electrically connecting a second end of the fuse conductor to one of the anode wire and the solid electrolyte layer.
A method of making a solid electrolytic capacitor including a capacitor element including a porous sintered body made of valve metal, an anode wire projecting from the porous sintered body, and a dielectric layer and a solid electrolyte layer covering the porous sintered body, the method comprising the steps of:
- bonding a first end of a fuse conductor to an external conduction member;
- electrically connecting a second end of the fuse conductor to one of the anode wire and the solid electrolyte layer;
- forming a resin package to cover the capacitor element;
- and
- collectively cutting the resin package and the external conduction member.
Dependencies are inferred from the claim text.